Fore-plate carriage.



W. W. LEACH.

FORE PLATE CARRIAGE.

APPLICATION HLED JULY 25. 1917.

Patented May 7,1918. 4 SHEETS-SHEET l w. w LEACH.

FORE PLATE CARRIAGE.

APPLICATION FILED JULYZS. 19I7.

Patented May 7,1918.

4 SHEETS-SHEET 2 Imam 81 Q Vitnc-m W. W. LEACH.

FORE PLATE CARRIAGE.

APPLICATION FILED JULY 25. 1917.

Patented May 7,1918.

4 SHEETS-SHEET 3.

W. W. LEACH.

FORE PLATE CARRIAGE.

APPLICATION FILED JULY 25. I917. ,2 5,45 Patented May 7,1918.

4 SHEETS-SHEET 4- 'itlij i @TfiiTFlfi PATENT WILLIAM "i/V. LEAGH, OF MANSFIELD, OHIO, ASSIGNOR OF ONE-HALF T0 ALBERT I.

DAVEY, OF MANSFIELD, OHIO.

FORE-PLATE CARRIAGE.

Specification of Letters Patent.

Patented May 7, 11.918.

Application filed July 25, 1917. Serial No. 182,604.

To all whom it may concern:

' Be it known that I, l/VILLIAM XV. LEAGH, a citizen of the United States of America, residing at Mansfield, in the county of Richland and State of Ohio, have invented certain new and useful Improvements in Fore- Plate Carriages, of which the following is a specification.

This invention relates to a foreplate carriage.

The preferred embodiment of the invention as shown in the drawing is especially applicable for use in connection with rolling mills.

It is well known to those skilled in the art of rolling sheet metal or the like that the working surfaces of the rolls become marred, rough or pitted producing corresponding defects in the metal sheets and that in order to roll perfect or commercial sheet steel or the like the working surfaces of the rolls must be maintained in a highly polished and smooth condition, and free from pitted or marred surfaces, therefore during the process of'rolling sheet metal, it is customary to periodically perform the functions of polishing and smoothing the rolls through. the medium of a polishing device without removing the rolls from the housings.

in the process of rolling sheet metal, a fore-plate is arranged between the housings for the purpose of supporting and to assist in guiding the sheets of metal into the pass of the rolls as the sheets are manipulated to roll same by the operator of the rolling mill. The fore-plates used for rolling mills are cumbersome, unwieldl, heavy and difficult to remove from and place between the housings of rolling mills, thereby consuming much time and labor in the operation and occupying space when removed from between the rolls that otherwise would be available for other uses.

The primary object of the present invention is to provide a carriage for the foreplate that affords means to facilitate and expedite its removal. from between the housings to permit free access to the rolls without obstruction or interference for polishing purposes or the like, and means to position the fore-plate with respect to the rolls when it is desired to use the fore-plate for the purpose intended.

These and other objects are attained by the mechanism illustrated in the accompanying drawings, in which:-

Figure 1 is a plan view of a fragment of the housings and one roll of a conventional type of rolling mill provided with a foreplate which is shown in working position in full lines and withdrawn from working position in dotted lines.

Fig. 2 is a side elevation of a fragment of one housing and fragments of two rolls showing two positions of the carriage and fore-plate in dotted lines.

Fig. 3 is a side elevation of a fragment of a rolling mill housing showing the supporting bracket of the carriage pivotally mounted in a bearing secured to said housing.

Fig. is a cross-sectional plan view of Fig. 3.

Fig. 5 is an enlarged view of the lifting and positioning mechanism of the carriage showing one end of the fore-plate in full lines resting upon the ordinary transverse supporting bar which is secured to the lions ings and also the position of the fore-plate in dotted lines after it has been withdrawn from the pass of the rolls preparatory to swinging the carriage and fore-plate from between. the housings.

F 6 is a detail view of the link cushioning mechanism showing one of the front lever lifting arms at the extreme limit of its free rearward throw.

Fig. 7 is a detail view of the link cushioning mechanism showing one of the front lever lifting arms at the extreme limit of its rearward throw.

Fig. 8 is a plan view showing the lifting and positioning mechanism of the carriage mountedupon the free end of the carriage frame. The pivoted bracket of the carriage is omitted from this view.

Fig. 9 is a cross-section of the split frictional clamping and bearing end of the pivotal bracket showing mechanism applied thereto for tilting the carriage frame, Fig. 8.

Fig. 10 is a perspective view of one of the angular supporting members which is pro vided with a catch.

dium' of the wing-portions 8 and 9 of the fore-plate.

The fore-plate, as shown in Fig. 2, is preferably supported in the manner described at an incline with respect to the pass of the rolls. In the construction and arrangement of the fore-plate as described, it is necessary for the operator when he desires to polish the rolls or perform any other work thereon, to remove the fore-plate from between the rolls so that free and unobstructed access to and from the rolls can be obtained and further to permit the polishing device to be slidably supported upon the transverse bar 5,

It is the present practice of the operation of rolling mills to move what is called a buggy underneath the fore-plate, engage and support the fore-plate and remove it from between the housings and place or position it between the housings and in the pass of the rolls when it is desired to use same.

4 ings in their preferred form, in which reference numeral 10 represents a depending supporting bracket and bearing which is rigidly secured to a journal 11 that is loosely fitted in a vertical bearing 12, having a closed end 13.

The bearing 12 is securely bolted to the lug 14 of the housing through the medium of the bolts 15. The free end 16 of the bracket is enlarged and provided with an aperture 17 to receive one end of the frame of a carriage that will be described hereinafter. A slot 18 is formed between the portions 19 and 20 which communicates with the aperture 17 in the free end 16, providing means for contractingv the aperture 17 to frictionally clamp one end of the carriage frame thereto through the medium of the bolts 21 in a manner described hereinafter.

The carriage frame is preferably made of a round or tubular material as shown in the drawings, and preferably formed substantially as shown, to provide parallel portions 22 and 23' spaced a pre-determined distance apart. The portion 22 of the carriage frame is inserted in the aperture 17 of the free end 16 and adjustably clamped therein by the bolts 21. carriage f ame is provided with a transverse aperture 24 to receive a pin 25 which pro jects beyond the outer surface of the'parallel portion 22 of the carriage frame into and preferably through an opening 26 formed in the free end 16to communicate with the aperture 17 A set-screw 27 threadably engages a suitable aperture formed in the bearing 12 and is arranged so as to contact with the projecting end of the pin 25; said set screw being held in place after adjustment by a lock-nut 28.

It will be noted that the opening 26 is considerably larger than the pin 25, admitting of movement therein of the pin. When it is desired to raise or lower the parallel portion 23, the set-screw 27 is manipulated to pivot the pin 25 in the opening 26 which in turn forces the parallel portion 22 to rotate in the free end 16 thereby raising or lowering as the case may be, the parallel portion 23, it being understood that prior. to manipulating the set-screw 27 for adjusting purposes, the clamping bolts 21 have been loosened to permit of free rotation of the parallel portion 22 in the aperture 17 of the free end 16.

A sleeve 29 is loosely mounted upon the parallel portion 22 and provided with bifurcated lever lifting arms 30 and 31.

carrying rollers 32 and 33. A flanged collar 34 is also mounted upon the parallel portion 22 of the carriage frame to hold the member against lateral movement in one direction, a cotter-pin being inserted in any one of the series of holes 35. A member 36 is attached to the arm 31 having its end overlapping the flange of the collar 34 to hold and retain the sleeve member 29 in place and prevent lateral movement thereof in the opposite direction.

A lifting lever arm 37 preferably made of shorter length than the pair of lifting lever arms 30 and 31, havingits end bifurcated, is loosely mounted upon the parallel portion 23 of the carriage frame and is held from lateral movement by inserting cotter pins or the like in the apertures 38 formed in the parallel portion 23 (see Fig; 8). A roller 39 is mounted upon a pin 40 to rotate within the bifurcated portion of the lever lifting arm 37.

Crank arms 41 and 42 are provided on the sleeve member 29, spaced apart and arranged to aline with the lever lifting arm The parallel portion 22 of the 37. A bearing pin 43 is secured adjacent the ends of the crank arms 41 and 42 and an elbow fitting 43' is loosely mounted thereon leaving a portion thereof projecting toward the lifting arm 37 which is provided with a screw-threaded aperture to engage one end of a connecting rod 44. The crank arms 41 and to w ich the pin 43 is secured are shorter in length than the arms 30 and 31, therefore the arms 30 and 31 carrying the rollers 32 and 33 travel past dead center faster than the lever arm 37, thereby sliding the fore-plate over the roller while the lever arm 37 is raising the foreplate and the lever arms 30 and 31 are moving downward past dead center lowering the front end of the fore-plate. The opposite end of the connecting rod 44 is threadably connected to a bifurcated elbow fitting 45 which is loosely mounted upon and connected to the pin 40, thereby connecting the pair of lifting lever arms 30 and 31 to the lifting arm 37 through the medium of the cranks 41 and 42 and sleeve 29 for simultaneous movement.

By the use of the elbow fittings, the rod 44 is positioned at a higher plane than the pins 40 and 43, thereby providing a clearance space 46 to prevent interference of the rod 44 with the cushioning mechanism hereinafter described. The fore-plate 6 is provided with blocks 47 and 48 having plane depressions such as 49 formed therein which merge into circular depressions such as 50, thereby forming lip portions 51 and 52. The depressions or pockets in the blocks are formed in line with the rollers 32 and 33 and are adapted to engage therewith. Clips 53 and 54 are arranged on the side and secured to the lever arm 42 in such a manner as to slidably receive a curved hand lever 55.

The above describes the mechanism for directly operating the lever lifting arms hereinbefore described to impart the complete free and non-restricted forward and rearward throws thereof.

In order to more efliciently operate the lifting mechanism of the carriage, a cushioning mechanism is provided to absorb the vibration and jar of the throw of the lifting mechanism in either direction and which permits further yielding throw or movement in either direction of the lifting arms and cranks, To perform this function, a yoke 56 is provided having one end thereof loosely connected to the pin 43. The opposite end 57 of the yoke and the partition wall 58 are provided with alined apertures into which sleeves 59 and 60 are slidably fitted to receive and journal one end of a slotted bar 61.

The end 62 of the slotted bar slidably en gages the parallel portion 23 of the carriage frame. The opposite end of the bar 61 projects through the sleeve 59 and is threaded to engage a nut 63, thereby pro-- viding means for tensioning the spring 64 between the washers 65 and 66. his mechanism provides a means for cushioning the forward and rearward throw of the lever lifting arms and mechanism and permits of additional yielding movement or throw thereof after the lifting lever arms and mechanism have reached the limit of their free forward or rearward movement. The forward free throw or movement of the lifting lever arms 30 and 31 is shown in Fig. 6 in which the end 62 of the slotted position bar 61 is shown in contact with the parallel portion 23 of the carriage frame. The limit of the free rearward movement of the lifting lever arms is shown in Fig. 7 in which one end 67 of the slotted portion of the bar is shown in contact with the parallel. portion 23 of the carriage frame.

The detail views, Figs. 6 and 7, show the extreme forward and rearward free movement of the lever lifting arms 30 and 31 and operating mechanism, but attention is called to the fact that further forward or rearward throw can be imparted to the lever lifting arms and mechanism when it is desired.

The above describes the construction of the carriage and lifting mechanism.

The operation is as follows:

When it is desired to remove the fore-plate from its position in the pass of the rolls, the hand-lever 55 is drawn to the dotted line position marked a and force is exerted thereon to force it to the dotted line position marked 5 (see Fig. 5). The power imparted thereon imparts movement to the lifting lever arms, forcing the rollers 32 and 33 to first contact with and engage the depressed plane portions 49 formed in the blocks 47 and 48, gradually raising the fore-plate, and the rollers upon further movement of the arms engage the circular depressions 50 of the,

blocks 47 and 48, imparting a sliding forward movement to the fore-plate and at the same time raising it to the position indicated at c in dotted lines, Fig. 1.

While the lifting arms 30 and 31 carrying the rollers 32 and 33 are raising and carrying the fore-plate to the position indicated at 0, the roller 39 mounted on the lever arm 37 contacts with the rear end of the fore plate and raises it from the transverse supporting bar 5 and as the lifting lever arms 31 and32 are arranged to travel past dead center throw before the lever arm 37 reaches dead center throw, the lever arm 37 raises and tilts the rear end of the fore-plate to a greater extent than the lever arms 30 and 31 raise the front end of the fore-plate, as shown by dotted lines and indicated at 6.

Attention is called to the fact that the throw of the lever lifting arms 30 and 31 is arranged with relationto the lifting arm 37 r by adjusting thebar 4:4, to permit the lever arms 30 and .31 to carry the foreeplate forward to the position indicated at c in Fig.1

and -thearms 30 and .31 beyond their. dead center throw, which permits the forward end of the fore-plate to be lowered while; the

lifting lever arm 37 is approaching itsdead center throw and raising the rear end of the] fore-plate, thereby forcing it to ,assunieats.

raisedposition as shown in dotted line in Fig. 2, after the same has been withdrawn from its position in the pass of therolls,

preparatory to swinging the carriage to. re-

move the fore-plate from betweenthe hous:

ings.

Referring now to Figs. 5, 6 and 7, atten-.

tion is called to the fact that when the lift-M ing lever arms are forced to assume the limit of their free forward movement with the end 67 of the slotted bar 61 in contact with the parallel portion 23 of the carriageframe,

further forward movement can be imparted... to the lifting leverarms by exerting .addi,.

tionalpressure upon the hand lever 55, which forcesthe end57 of the yoke in contact with 1 the sleeve 65 and againstthe spring 64: com; pressing and forcing the spring against the sleeve 66, thereby allowing further forward movement of the liftinglever arms. This additional movement of the arms permitsthe operator of the lifting mechanism to force a further forward throw or downward move, ment of the lever lifting arms, permitting thecarriage and lifting mechanism to be easily withdrawn from. be neath the foreplate and obviating anyliability in so doing of the,rollers, of thelifting arms contacting with the fore-plate.

The spring 64 also provides a cushionto absorb thejar or vibration of the mechanism as the lifting levers are forced to the. limit of their free forwardmovement, In the reverse operation in which the operator of the lifting mechanism exertsa pressure on,

the lever 55 to throwthe lifting lever arms to the .fullextent of their free rearward movement or throw, the end 66 of thesleeve 60.is forced in contact with the spring. compressing and forcing the same to: exert a pressure against the sleeve 65 and end .57 ofthe yoke, allowing foradditional rearward movement of the lifting lever arms and a at the same time cushioning the mechanism,

thereby. eliminating the jar and vibration.

caused: by throwing the lifting lever arms to the limit of their free rearward movement or throw,

Assumingthat thefore .plate is. in its working position preparatory to rolling as shown in full lines in Fig. 1, andthe ,opeiia tor desires to remove samefrom between. the.

housings for polishing purposes, orthe like,

hedraws the lever55 to thefposition, shown at a and forces it downward to the position shown at b, forcing the lever lifting arms in contact with the fore plate carrying it forward to an extent as shown at 0 in dotted lines which is s i1ificiei1t to permit the carria 'e and fore lateto swin from between the housings 1 and 2 to any desired position out of thewayof .or more convenient for the operator. of the rolling mill.

hen it is desired to position the .fore plate in the pass of the rolls, the carriage or I lifting, mechanism carrying the fore plate is swungjtoward. the rolls until the yielding plug 68 contacts with the lug 14: of the housing and the latch forced to lock the carriage in. working position. The operator then raises the curved hand lever from the point marked 6 to the point marked a in Fig. 5, forcing the lifting levers to the full line positions as shown in said figure, (from which point when released it drops by gravity to the position shown in full lines) thereby permitting, the carriage and lifting mechanism, to remain underneath and free. from contact with the fore plate d uring the rolling process...

As will be observed, the lifting mechanism in no manner supports the fore-plate while the rolling, process is taking place. W'hile the carriage and lifting mechanism is located beneath the fore-plate, it is deemed expedient to yieldingly lock the carriage and lifting mechanism in place and in order to successfully accomplish this, the angular supporting member 6 is provided with an additional wall 69 whichlies against the housing and a catch 70 is provided thereon. A latch lever 71 is pivotally mounted on a pin 72 which is pivotally secured upon the free end %6 of the bracket and provided with an arm 3.

A bolt 74 is fastened to an ear 75 formed on the bearing and a nut 76 threadably engages the bolt 74 and contacts with thereby moving the lever in either direction I as desired. WVhn it is desired to release the carriage, the operator exerts a pressure upon the end 79 of the locking lever, forcing the roller .7 8 to disengage from the catch 7 O.

In Fig. 2, the limit of the free forward throw of the lifting lever arms and the limit of the free rearward throw thereof .prepara tory to lifting and swinging the carriage and lift ng lever arms from and between the housings are shown in clottedlines, with the proper inclination and relation of the foreplate to the pass of the rolls for rolling sheet metal or the like.

Attention is called to the fact that the car riage frame and lifting mechanism can be lifted from the journal bearing 12 and used on any other rolling mill if desired, by removing the journal 11 from its pivotal bearing 12. lVhen this is done, the operator forces, through the medium of the hand lever 55, the lifting levers to their full forward free movement or throw and then forces further forward and downward movement or throw thereof by compressing the spring 64c thereby swinging the lifting lever arms and carriage from beneath the fore-plate preparatory to removing or changing the carriage and lifting mechanism to another rolling mill.

In order that the journal 11 may be properly lubricated, the end 80 of the journal 11 is spaced apart from the closed end 13 providing a chamber 81 to receive oil or grease. A set-screw 82 engages a threaded aperture formed in the end 13 contacting with and supporting the journal 11 spaced apart from the end 13. The set-screw is held in any adjusted position desired by the lock nut 83. The set-screw 82 also provides a means for bodily raising or lowering the carriage frame vertically.

Attention is further called to the fact that it may be desirable to raise the roller 39 or lever arm 37 with respect to the rollers 32 and 33. This can be accomplished as described, at the will of the operator by loosening the clamping bolts 21 and adjusting the set-screw 27 to force the portion 22 of the carriage frame to rotate within the aperture 17 of the bearing 12 which has the effect of changing the position, to wit: raising or lowering the roller 39 with respect to the horizontal plane of the rollers 32 and 33.

Free movement or throw of the lever lif ing arms refers to movement or throw thereon in either direction, unrestricted by the cushioning means.

What is claimed is:

1. In a fore-plate carriage, a pivoted bracket and frame, lever arms mounted upon said frame, means to raise and lower the free ends of said lever arms. 2. In a fore-plate carriage, a pivoted bracket and frame, lever arms mounted upon said frame, means to raise and lower the free ends of said lever arms. housings, and means to lock the pivoted bracket to said housings.

3. The combination of housings of a rolling mill and a fore-plate with a carriage comprising means pivoted to one of said housings and adapted to engage and elevate the fore-plate and remove said fore-plate from between the housings, and which is adapted to position said fore-plate with re spect to the pass of the rolls.

4. The combination of housings and a fore-plate with a carriage comprising means to engage and elevate the fore-plate and remove said fore-plate from between the housings, and which is also adapted to position said fore-plate with respect to the pass of the rolls, and means to .lock said foreplate to the rolling mill housings.

5. In a carriage for use in combination with rolling mills, a pivoted bracket and frame, lever arms pivotally mounted on said frame, and means to pivot said lever arms.

6. In a carriage for use in combination with rolling mills, a pivoted bracket and frame, lever arms pivotally mounted on said frame, means to pivot said lever arms, and means to lock said carriage to the rolling mill.

7. In a carriage for use in combination with rolling mills, a pivoted bracket and frame, a pair of lever arms of equal length pivotally mounted on said frame, a lever arm of shorter length than the aforementioned arms pivotally mounted on said bracket, and means to simultaneously pivot said arms.

8. In a carriage for use in combination with rolling mills, a pivoted bracket and frame, a pair of lever arms of equal length pivotally mounted on said frame, a lever arm of shorter length than the aforementioned arms pivotally mounted on said bracket, means to simultaneously pivot said arms, and means to adjust the pivotal throw of said arms with relation to each other.

9. In a carriage for use in combination with rolling mills, a pivoted bracket and frame, a pair of lever arms of equal length pivotally mounted on said frame, a lever arm of shorter length than the aforementioned arms pivotally mounted on said bracket, means to simultaneously pivot said arms, means to adjust the pivotal throw of said arms with relation to each other, and means to lock said bracket to the rolling mill.

10. In a rolling mill, a supporting bar, a fore-plate mounted on said bar, a car riage pivotally secured to the rolling mill, said carriage being provided with means to engage and raise said fore plate from the said bar preparatory to removing the foreplate from its position with respect to the rolls, and to position the said fore-plate with respect to the rolls.

11. In a rolling mill, a supporting bar, a fore-plate mounted on said bar, a carriage pivotally secured to the rolling mill, said carriage being provided with means to en page and raise said fore plate from its position with respect to the rolls and to position the said fore-plate with respect to the rolls,

and means to lock said carriage to the rolling mill.

12. In combination, a machine equipped with a removable plate, housings, rolls pro vided thereon, a carriage comprising means pivoted to said housings for engaging, raising and supporting said plate preparatory to conveying same to a predetermined point, and which is also adapted to position same in the pass of the rolls, and means to lock said carriage to said machine.

13. In combination, a machine equipped withia removable plate, housings, rolls provided thereon, a carriage comprising means pivoted to said housings for engaging, raising and supporting said plate preparatory to conveying same to a pre-determined point, and which is also adapted to position same in the pass of the rolls, means to lock said carriage to said machine and means to cushion the throw of the supporting means.

14. In a rolling mill, rolls, housings, a fore-plate supported by and between the housings and arranged adjacent to the pass of the rolls, a carriage pivoted to one of said housings and adapted to engage, raise, support and move the fore-plate independent of the carriage preparatory to removing said plate from between the housings.

15. In. a rolling mill, rolls, housings, a fore-plate supported by and between the housings and arranged adjacent to the pass of the rolls, a carriage pivoted to one of said housings to engage, raise, support and move the fore-plate independent of the carriage preparatory to removing said plate from between the housings, and means to lock said carriage to the housings.

16. The combination of the elements de scribed in claim 1, in combination with means to adjust the horizontal plane of the free ends of one of said lever arms with respect to the horizontal plane of the free ends of the others.

17. In a f0re-plate carriage, a pivoted bracket and frame, lever arms mounted upon said frame, means to raise and lower the free ends of said lever arms, and means for cushioning the effect of the contact of said bracket with the housing.

18. The mechanism defined in claim 1, in combination with means to cushion the effect of raising and lowering the said lever arms and operating means 19. In a fore-plate carriage, a pivoted bracket and frame, lever arms mounted upon said frame, means to raise and lower the free ends of said lever arms, and meansfor securely but yielding'ly locking the bracket and mechanism carried thereby to the housing.

20. In a fore-plate carriage, a pivoted bracket and frame, lever arms mounted upon said frame, means to raise and lower the free ends of said lever arms, housings, means to lock the pivoted bracket to said housings,

in combination with means for laterally adjusting aid lever arms.

21. A carriage for rolling mills comprising parallel spaced apart portions in combination with lever arm lifting means and cushioning means therefor, as described and set forth.

22. In a carriage of the character described, a frame, lever lifting arms pivotally mounted thereon, means to operate said lifting arms simultaneously for a free rearward or forward throw, and means to cushion the forward and rearward throw thereof.

23. In a carriage of the character described, a frame, lever lifting arms pivotally mounted thereon, means to operate said lifting arms simultaneously for a free rearward or forward throw, means to cushion the for ward and rearward throw thereof, and means to impart further forward or rear ward throw to the lever lifting arms by ac tuating the cushioning means to force it to yield.

2 In a carriage for rolling mills or analogous machines provided with a fore-plate adapted to be swung to and 'from the machine, a lifting mechanism mounted thereon which is adapted to engage, raise and impart a limited sliding forward movement to said fore-plate, and means to yieldingly lock the carriage to themachine.

A carriage for rolling mills or analogous machines provided with a foreplate adapted to be swung to and from the machine, a lifting mechanism mounted thereon which is adapted to engage, raise and impart a limited sliding forward movement to said fore-plate, and means to yieldingly lock the carriage to the machine.

26. In a fore-plate carriage for rolling mills, a pivoted frame, lifting means mount.- ed on said frame, means to operate the lifting mechanism, cushioning means therefor, and means to tilt one side of said frame.

27. In a fore-plate carriage for rolling mills, a pivoted frame, lifting means mounted on said frame, means to operate the lifting mechanism, cushioning means therefor, means to tilt one side of said frame, and means to lock said frame to the rolling mill.

28. In a carriage for rolling mill foreplates, a frame provided with two parallel portions, a pair of lifting lever arms mounted upon. one of said portions, a lifting lever arm of a different length mounted on the other portion, means to operate said lever lifting arms simultaneously for a free rearward or forward throw. I I I 29. In a carriage for rolling mill foreplates, a frame provided with two parallel portions, a'pair of lifting leverarms'mounted upon one of said portions, alifting'l-ever arm of a different length mounted on the other portion means to operate said lever lifting arms simultaneously for a free rearward or forward throw, and means to cushion and permit additional throw of the arms and operating mechanism in either direction by the actuation of the cushioning means.

30. In a carriage for rolling mill foreplates, a frame provided with two parallel portions, a pair of lifting lever arms mounted upon one of said portions, a lifting lever arm of a difierent length mounted on the other portion, means to operate said lever lifting arms simultaneously for a free rearward or forward throw, means to cushion and permit additional throw of the arms and operating mechanism in either direction by the actuation of the cushioning means, and means to yieldingly lock the frame to the rolling mill.

31.111 carriage for rolling mill foreplates, a frame provided with two parallel portions, a pair of lifting lever arms mounted upon one of said portions, a lifting lever arm of a different length mounted on the other portion, means to operate said lever lifting arms simultaneously for a free rearward or forward throw, means to cushion and permit additional throw of the arms and operating mechanism in either direction by the actuation of the cushioning means, means to yieldingly lock the frame to the rolling mill, and means to change the dead Center position of the single lever lifting arm with respect to the pair of lifting lever arms.

32. In a carriage for rolling mill foreplates, a frame provided with two parallel portions, a pair of lifting lever arms mount ed upon one of said portions, a lifting lever arm of a different length mounted on the other portion, means to operate said lever lifting arms simultaneously for a free rearward or forward throw, means to cushion and permit additional throw of the arms and operating mechanism in either direction by the actuation of the cushioning means, means to yieldingly lock the frame to the rolling mill, means to change the dead center position of the single lever lifting arm with respect to the pair of lifting lever arms, and means to raise or lower the plane of one of the parallel portions of the frame with respect to the other.

33. The combination of a rolling mill and a fore-plate with a pivoted frame, lifting mechanism mounted upon said frame, means to operate the lifting mechanism to engage the fore-plate, raise same and impart a limited sliding movement thereto.

84. lhe combination of a rolling mill and a fore-plate with a pivoted frame, lifting mechanism mounted upon said frame,

means to operate the lifting mechanism to engage the fore-plate, raise same and impart a limited sliding movement thereto, and means to yieldingly lock the frame to the rolling mill.

35. The combination of a rolling mill and a fore-plate with a pivoted frame, lifting mechanism mounted upon said frame, means to operate the lifting mechanism to ngage the fore-plate, raise same and impart a limited sliding movement thereto, means to yieldingly lock the frame to the rolling mill, and means to laterally adjust the lifting mechanism.

36. A carriage for rolling mill foreplates, comprising a frame, a lifting mechanism mounted thereon comprising a plurality of lever arms spaced apart from each other, means to connect same for simultaneous forward and rearward throw, and means to cushion the rearward and forward throw of the lever arms.

37. Acarriage for rolling mill fore-plates, comprising a frame, a lifting mechanism mounted thereon comprising a plurality of lever arms spaced apart from each other, means to connect same for simultaneous forward and rearward throw, means to cushion the rearward and forward throw of the lever arms and means to lock the frame to the rolling mill.

38. A carriage for rolling mill fore-plates, comprising a frame, a lifting mechanism mounted thereon comprising a plurality of lever arms spaced apart from each other, means to connect same for simultaneous forward and rearward throw, means to cushion the rearward and forward throw of the lever arms, means to lock the frame to the rolling mill, and means to tilt one side of the frame.

39. in a rolling mill, a fore-plate, a pivoted frame, a plurality of lever arms of different lengths mounted on said frame, means for connecting said arms for simultaneous movement, means to impart a for ward 01' rearward throw to said lever arms to engage, lift and impart a limited sliding movement to the fore-plate.

4:0. In a rolling mill, a fore-plate, a pivoted frame, a plurality of lever arms of different length mounted on said frame, means for connecting said arms for simultaneous movement, means to impart a forward or rearward throw to said lever arms to engage, lift and impart a limited sliding movement to the fore-plate, and means to lock the frame to the rolling mill.

41. In a rolling mill, a fore-plate, a p1voted frame, a plurality of lever arms of different lengths mounted on said frame, means for connecting said arms for simultaneous movement, means to impart a for ward or rearward throw to said lever arms to engage, lift and impart a limited sliding 1 movement to=-th'eforieplate, and means to mounted on=said frame; means for connect- 5 ing said" arms for simultaneous movement, l0 'means-to impart a forward or rear-Ward I? throw tosaid' lever armsto engage, lift and impart a'limited sliding movement to the fore-plate.

43In a rolling mill, a fore-plate, a pivoted-frame, plurality of lever arms of different lengths mounted on said frame, means forconnecting said arms'for simultaneous movement; means to impart a forward or rearward throw tosaid lever arms to engage, lift and'impart a limited sliding movement to the fore-plate, and means to verticallyadjust-the journal of the pivoted 'irame in its-beari-ng andsupport to provide an oil or a grease chamber.

111 testimony whereof I affixmy signature.

WILLIAM LEA'CH;

""G'opies of this 'iiatent may be obtained for'five cents'each,.' by addressing the Commissioner of'Pat'enta -Washington', D. C. 

